Stock-Based Compensation Plans (Schedule Of Weighted-Average Assumptions For Grants Made) (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Payment Arrangement, Noncash Expense [Abstract]
Dividend yield	3.06%	3.05%	2.20%
Volatility	36.28%	27.15%	25.17%
Risk-free interest rate	0.50%	1.23%	2.64%
Expected lives in years	5 years 2 months 12 days	5 years 2 months 12 days	4 years 2 months 12 days